Converter coal washing system and smelting system

Abstract

The utility model relates to a converter coal washing system and a smelting system. The converter coal washing system comprises a water inlet main pipe, a sedimentation tank, a first cooling unit and a second cooling unit, according to the converter coal washing system, the plurality of coarse particle separators are connected in parallel on the water inlet main pipe, so that the normal operation of the whole system can be ensured when one coarse particle separator is maintained and operated; two groups of cooling units are arranged; wherein one group of cooling units is an in-use unit, the other group of cooling units is used as a standby or standby unit, and when the in-use cooling units need to be transformed or maintained after being used for a long time, the multiple groups of circulating pipelines for connecting the in-use cooling units and the water pump are closed one by one; and meanwhile, multiple groups of circulating pipelines of the standby cooling unit are connected into the water pump one by one, so that non-stop replacement of the cooling unit is realized, and normal production of the converter coal washing system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of smelting equipment technology, and in particular to a converter coal washing system and a smelting system. Background Technology

[0002] During the smelting of steel in a converter, a large amount of brownish-yellow smoke is generated, mainly composed of CO, CO2, N2, and various types of dust. The flue gas temperature is very high (1400℃-1600℃). Failure to utilize this smoke would result in a waste of energy and materials. Therefore, converter production employs a flue gas recovery system and a coal washing system to recover and reuse CO, dust, and heat, respectively. The flue gas ejected from the furnace mouth first enters the vaporization cooling flue. The high-temperature flue gas passes through a waste heat recovery device, which lowers the flue gas temperature while simultaneously collecting and converting the heat energy for reuse. The cooled flue gas then enters a scrubbing tower, where the washing water repeatedly washes the flue gas, fully dissolving and filtering the dust. The remaining relatively pure gas is then recovered to the gas holder by a blower. The washing water used to filter the flue gas flows through a trough into the coal washing system for treatment and recycling. Throughout the converter production process, the converter coal washing system plays a crucial role in energy recovery and water resource reuse, making it an indispensable part of production.

[0003] After prolonged use, the converter coal washing system requires regular modification and maintenance. During the modification process, the entire system needs to be shut down, which will affect production. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the existing converter coal washing system needs to be regularly modified and maintained after long-term use, and the entire system needs to be shut down during the modification process, which will affect production.

[0005] To solve the above-mentioned technical problems, this utility model provides a converter coal washing system for treating the rinsing water containing particulate matter that flows into the water tank during the converter steelmaking process, including:

[0006] The water inlet main pipe has its input end connected to the output end of the water tank, and at least two coarse particle separators are connected in parallel on the water inlet main pipe.

[0007] A sedimentation tank, the input end of which is connected to the output end of the main inlet water pipe;

[0008] The first cooling unit includes a first hot water well and a first cooling tower. The input end of the first hot water well is connected to the output end of the sedimentation tank through a first circulation pipeline. The output end of the first hot water well is connected to the input end of a water pump through multiple second circulation pipelines. The output end of the water pump is connected to the input end of the first cooling tower through multiple third circulation pipelines corresponding to each of the second circulation pipelines. Each of the second circulation pipelines is equipped with a second shut-off valve, and each of the third circulation pipelines is equipped with a third shut-off valve.

[0009] The second cooling unit includes a second hot water well and a second cooling tower. The input end of the second hot water well is connected to the first circulation pipe through a fourth circulation pipe. The output end of the second hot water well is connected to each of the second circulation pipes through multiple fifth circulation pipes. The input end of the second cooling tower is connected to each of the third circulation pipes through multiple sixth circulation pipes. Each of the fifth circulation pipes is equipped with a fifth shut-off valve, and each of the sixth circulation pipes is equipped with a sixth shut-off valve.

[0010] In one embodiment of this utility model, a thickening tank and a filter press are also included. The input end of the thickening tank is connected to a sedimentation tank through a feed pipe, and the output end of the thickening tank is connected to the input end of the filter press through a discharge pipe. A mud pump is installed on the feed pipe.

[0011] In one embodiment of this utility model, a first shut-off valve is provided on the first circulation pipeline.

[0012] In one embodiment of this utility model, a fourth shut-off valve is provided on the fourth circulation pipeline.

[0013] In one embodiment of the present invention, a reagent adding device is included, which is disposed on the sedimentation tank for adding reagents to the sedimentation tank.

[0014] In one embodiment of this utility model, a pH meter is provided in the sedimentation tank.

[0015] In one embodiment of this utility model, the sedimentation tank is an inclined plate sedimentation tank.

[0016] In one embodiment of this utility model, at least one secondary inlet pipe is connected in parallel to the main inlet pipe, and a coarse particle separator is connected to both the secondary inlet pipe and the main inlet pipe at both ends of the secondary inlet pipe.

[0017] In one embodiment of this utility model, a seventh shut-off valve is provided at both ends of each of the coarse particle separators.

[0018] A smelting system comprising a converter coal washing system as described in any of the preceding claims.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] The converter coal washing system and smelting system described in this utility model include a main water inlet pipe, a sedimentation tank, a first cooling unit, and a second cooling unit. This converter coal washing system has multiple coarse particle separators connected in parallel to the main water inlet pipe, ensuring the normal operation of the entire system while one coarse particle separator is being maintained or operated. It also has two sets of cooling units; one set is the active unit, and the other is a standby or ready-to-use unit. When the active cooling unit needs modification or maintenance after prolonged use, the multiple sets of circulation pipes connecting the active cooling unit to the water pump are closed one by one, while the multiple sets of circulation pipes of the standby cooling unit are connected to the water pump one by one, achieving non-stop replacement of the cooling units and ensuring normal production operations. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the converter coal washing system according to a preferred embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the first and second cooling units of the converter coal washing system according to a preferred embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure of the coarse particle separator in the converter coal washing system of a preferred embodiment of this utility model.

[0025] Explanation of reference numerals in the accompanying drawings: 1. Main inlet pipe; 11. Coarse particle separator; 111. Seventh shut-off valve; 2. Sedimentation tank; 3. First cooling unit; 31. First hot water well; 32. First cooling tower; 33. First circulation pipeline; 331. First shut-off valve; 34. Second circulation pipeline; 341. Second shut-off valve; 35. Water pump; 36. Third circulation pipeline; 361. Third shut-off valve; 4. Second cooling unit; 41. Second hot water well; 42. Second cooling tower; 43. Fourth circulation pipeline; 431. Fourth shut-off valve; 44. Fifth circulation pipeline; 441. Fifth shut-off valve; 45. Sixth circulation pipeline; 451. Sixth shut-off valve; 5. Thickening tank; 6. Filter press; 7. Slurry pump. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1

[0027] Reference Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a converter coal washing system for treating the rinsing water containing particulate matter that flows into the water tank during the converter steelmaking process. The system includes...

[0028] The water inlet main pipe 1 has its input end connected to the output end of the water tank, and at least two coarse particle separators 11 are connected in parallel on the water inlet main pipe 1.

[0029] Sedimentation tank 2, whose input end is connected to the output end of inlet water main pipe 1;

[0030] The first cooling unit 3 includes a first hot water well 31 and a first cooling tower 32. The input end of the first hot water well 31 is connected to the output end of the sedimentation tank 2 through a first circulation pipe 33. The output end of the first hot water well 31 is connected to the input end of a water pump 35 through multiple second circulation pipes 34. The output end of the water pump 35 is connected to the input end of the first cooling tower 32 through multiple third circulation pipes 36 corresponding to each of the second circulation pipes 34. Each second circulation pipe 34 is equipped with a second shut-off valve 341, and each third circulation pipe 36 is equipped with a third shut-off valve 361.

[0031] The second cooling unit 4 includes a second hot water well 41 and a second cooling tower 42. The input end of the second hot water well 41 is connected to the first circulation pipe 33 through a fourth circulation pipe 43. The output end of the second hot water well 41 is connected to each of the second circulation pipes 34 through multiple fifth circulation pipes 44. The input end of the second cooling tower 42 is connected to each of the third circulation pipes 36 through multiple sixth circulation pipes 45. Each fifth circulation pipe 44 is equipped with a fifth shut-off valve 441, and each sixth circulation pipe 45 is equipped with a sixth shut-off valve 451.

[0032] Specifically, when the flushing water containing particulate matter passes through the coarse particle separator 11 on the main water inlet 1, the large particles in the flushing water are screened out for recycling. The filtered flushing water flows into the sedimentation tank 2. After adding chemicals and letting it stand for a period of time, the flushing water in the sedimentation tank 2 exhibits stratification. Dust settles to the bottom of the sedimentation tank 2, while the upper part of the sedimentation tank 2 is clear water. At this time, the temperature of the separated clear water is relatively high. The high-temperature clear water first flows into the hot water well for buffering and transition, and then is sent to the cooling tower for cooling and finally circulated to the converter production equipment for recycling.

[0033] Specifically, this converter coal washing system has multiple coarse particle separators 11 connected in parallel on the main water inlet pipe 1, and is equipped with two sets of cooling units (i.e., the first cooling unit 3 and the second cooling unit 4). One set of cooling units is the unit in use, and the other set of cooling units is a standby or ready-to-use unit. When the cooling unit in use needs to be modified or maintained after a long period of use, the multiple sets of circulation pipes connected to the water pump 35 of the cooling unit in use will be closed one by one, and at the same time, the multiple sets of circulation pipes of the standby cooling unit will be connected to the water pump 35 one by one, so as to realize the replacement of the cooling unit without stopping the machine and ensure the normal operation of production activities.

[0034] Specifically, assuming the first cooling unit 3 is the cooling unit in use, when the cooling unit needs to be replaced, first close the second shut-off valve 341 on one of the second circulation pipes 34, and close the third shut-off valve 361 on the corresponding third circulation pipe 36; at the same time, open the fourth shut-off valve 431, and open the fifth shut-off valve 441 on the fifth circulation pipe 44 and the sixth shut-off valve 451 on the sixth circulation pipe 45, which are connected to the aforementioned shut-off second circulation pipes 34 and third circulation pipes 36; then, following the above steps, sequentially close the shut-off valves on one of the second circulation pipes 34 and third circulation pipes 36, and sequentially open the shut-off valves on the corresponding fifth circulation pipes 44 and sixth circulation pipes 45, until all the shut-off valves on the second circulation pipes 34 and third circulation pipes 36 of the first cooling unit 3 are closed (and the first shut-off valve 331 is closed), while all the shut-off valves on the fifth circulation pipes 44 and sixth circulation pipes 45 of the second cooling unit 4 are open, and the replacement of the cooling unit without stopping the machine is completed.

[0035] Specifically, when the second circulation pipeline 34 and the third circulation pipeline 36 are connected to water pumps, each corresponding set of second circulation pipelines 34 and third circulation pipelines 36 can be connected to a water pump, or they can be connected to a water pump at the same time. The specific settings can be made according to the number of pipelines and the site conditions.

[0036] Furthermore, it also includes a thickening tank 5 and a filter press 6. The input end of the thickening tank 5 is connected to the sedimentation tank 2 via a feed pipe, and the output end of the thickening tank 5 is connected to the input end of the filter press 6 via a discharge pipe. A slurry pump 7 is installed on the feed pipe. Specifically, the slurry pump 7 can pump the sediment in the sedimentation tank 2 into the thickening tank 5, and finally, the slurry is further processed and utilized by the filter press 6.

[0037] Furthermore, a first shut-off valve 331 is installed on the first circulation pipeline 33.

[0038] Furthermore, a fourth shut-off valve 431 is installed on the fourth circulation pipeline 43. It is conceivable that the second cooling unit can be constructed in advance for backup, and can also be constructed according to the planned modification and upgrade schedule of the first cooling unit.

[0039] Furthermore, it includes a reagent addition device, which is installed on the sedimentation tank 2 for adding reagents to the sedimentation tank 2.

[0040] Furthermore, a pH meter is installed in sedimentation tank 2. Specifically, the pH meter can monitor and adjust the pH value in sedimentation tank 2 in real time to ensure that the reagents operate under optimal pH conditions, which is beneficial to improving sedimentation effect and treatment efficiency.

[0041] Furthermore, sedimentation tank 2 adopts an inclined plate sedimentation tank. Inclined plate sedimentation tanks have high sedimentation efficiency, small footprint, and good adaptability and energy-saving characteristics.

[0042] Furthermore, at least one secondary inlet pipe is connected in parallel to the main inlet pipe 1, and a coarse particle separator 11 is connected to both the secondary inlet pipe and the main inlet pipe 1 at both ends of the secondary inlet pipe.

[0043] Furthermore, each coarse particle separator 11 is equipped with a seventh shut-off valve 111 on the pipelines connected to both ends. When replacing or maintaining a single coarse particle separator 11, the corresponding seventh shut-off valve can be closed to carry out the relevant work. Example 2

[0044] This utility model also discloses a smelting system, including a converter coal washing system as described in Example 1.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A converter coal wash system for treating wash water containing particulate matter that is passed to a sump during a converter steelmaking process, characterised by: The system comprises, a water inlet main pipe, an input end of which is connected to an output end of a water tank, and at least two coarse particle separators are connected in parallel on the water inlet main pipe; a sedimentation tank, an input end of which is connected to an output end of the water inlet main pipe; a first cooling unit, which comprises a first hot water well and a first cooling tower, an input end of the first hot water well is connected to an output end of the sedimentation tank through a first circulation pipe, an output end of the first hot water well is connected to an input end of a water pump through a plurality of second circulation pipes, an output end of the water pump is connected to an input end of the first cooling tower through a plurality of third circulation pipes corresponding to the second circulation pipes respectively, and a second stop valve is arranged on each of the second circulation pipes, and a third stop valve is arranged on each of the third circulation pipes; a second cooling unit, which comprises a second hot water well and a second cooling tower, an input end of the second hot water well is connected to the first circulation pipe through a fourth circulation pipe, an output end of the second hot water well is connected to each of the second circulation pipes through a plurality of fifth circulation pipes respectively, an input end of the second cooling tower is connected to each of the third circulation pipes through a plurality of sixth circulation pipes respectively, and a fifth stop valve is arranged on each of the fifth circulation pipes, and a sixth stop valve is arranged on each of the sixth circulation pipes.

2. The rotary hearth leaching system of claim 1, wherein: The system further comprises a concentration tank and a filter press, an input end of the concentration tank is connected to the sedimentation tank through a feeding pipe, an output end of the concentration tank is connected to an input end of the filter press through a discharging pipe, and a slurry pump is arranged on the feeding pipe.

3. The rotary hearth leaching system of claim 1, wherein: A first stop valve is arranged on the first circulation pipe.

4. The rotary hearth leaching system of claim 1, wherein: A fourth stop valve is arranged on the fourth circulation pipe.

5. The rotary hearth leaching system of claim 1, wherein: The system comprises a medicament adding device arranged on the sedimentation tank for adding medicament into the sedimentation tank.

6. The rotary hearth leaching system of claim 5, wherein: A PH detector is arranged in the sedimentation tank.

7. The rotary hearth leaching system of claim 1, wherein: The sedimentation tank is a inclined plate sedimentation tank.

8. The rotary hearth leaching system of claim 1, wherein: At least one water inlet sub-pipe is connected in parallel on the water inlet main pipe, and one of the coarse particle separators is connected to a section on both ends of the water inlet sub-pipe and the water inlet main pipe.

9. The rotary hearth leaching system of claim 8, wherein: A seventh stop valve is arranged on both ends of each of the coarse particle separators.

10. A smelting system characterized by: The system comprises the converter coal washing system according to any one of claims 1-9.

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